Burglars broke into 14 homes in two Sheffield suburbs in a five-day crime spree.
Between Tuesday and last Friday, South Yorkshire Police received reports of 14 burglaries in the neighbouring suburbs of Sharrow and Highfields.
The force said crooks got into 12 of the homes through insecure doors or windows.
A force spokesman said: "Please be vigilant, it only takes a second to lock the door or close the window."
Anyone with information should call South Yorkshire Police on 101.